Can a nikah be done during pregnancy in Islam?

In Islam, pregnancy does not prevent a nikah from taking place. Scholars differ on some details, but the general view is that a valid marriage contract can be made. What matters most for you in the UK is the legal side. A nikah on its own is only legally binding in England and Wales if it happens in a registered religious building with an authorised person present. Otherwise, you will need a separate civil ceremony to make the marriage legal. In Scotland, a nikah can be legally binding if the celebrant is registered. In Northern Ireland, the same applies as long as the building and celebrant meet the legal rules. If you are pregnant, there is no extra legal barrier to giving notice or marrying. But do check with your local register office and your mosque or imam about their specific requirements. Some venues may have their own policies, so ask early. The key is to plan both the religious and the civil steps so your marriage is valid in the UK and recognised in your community.